What should I do after purchasing plane tickets online?

After purchasing plane tickets online, you should check your email for the confirmation and itinerary details. Make sure to review the information for accuracy and note down any important dates and times. Additionally, consider booking accommodations and transportation in advance, and check the airline's policies for baggage allowance and check-in procedures. Lastly, don't forget to print or save your boarding pass and travel documents for easy access on the day of your flight.